Thankfully, he somehow ended up at the post-race medical tent, being treated for heat exhaustion.

“My temperature had risen to 107,” he said. “They threw me in an ice bath to cool me down and try to get that under control — I don't remember any of that.”

Greenlee, 50, returned home to Altus on Monday after a trip to OU Medical Center after he finished the marathon.

At least four people were taken to a hospital during the races. An estimated 25,000 runners participated in this year's event.

A runner in his 30s was taken in serious condition to St. Anthony Hospital on Sunday, but because of federal privacy laws, the hospital could not release any information about his condition. Three others were taken in good condition.

Twenty-seven people at the marathon needed medical assistance, including 14 who needed to be treated by emergency medical crews, officials with the Emergency Management Services Authority said.

This was Greenlee's third time to run the Oklahoma City marathon. It also marked his seventh marathon, including the Boston Marathon in 2012.

This was the first time Greenlee has experienced any health issue during a marathon, he said. He attributes his blackout to the heat. Sunday, the temperature reached 73 degrees by 1 p.m., although Greenlee finished earlier in the day.

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by Jaclyn Cosgrove

Medical and Health Reporter

Jaclyn Cosgrove writes about health, public policy and medicine in Oklahoma, among other topics. She is an Oklahoma State University graduate. Jaclyn grew up in the southeast region of the state and enjoys writing about rural Oklahoma. She is...